Mechanical reset apparatus



5 Sheets-Sheet l INVENTOR. 0041?!) W [5LER BY flndnus jfarl flll lw u E. W. ISLER MECHANICAL RESET APPARATUS 24 i w 27 97 Z Oct. 11, 1966 Filed Oct. 7, 1965 Oct. 11, 1966 E. w. lSLER MECHANICAL RESET APPARATUS 5 Sheets-Sheet 2 Filed 0st. '7, 1965 INVENTOR. ZbUARD W fjLER Jndrus Sidr/{e Aer/keys Oct. 11, 1966 E. w. ISLER 3,

I MECHANICAL RESET APPARATUS Filed Oct. 7, 1965 5 Sheets-Sheet 5 4 I NVE NTOR. [DU/1R0 W [SLER zdrus f' jfar/f Af/Orney? United States Patent 3,278,709 MECHANICAL RESET APPARATUS Eduard W. Isler, Cleveland, Ohio, assignor, by mesne assignments, to A. 0. Smith Corporation, Milwaukee, Wis., a corporation of New York Filed Oct. 7, 1965, Ser. No. 493,741 11 (:laims. (Cl. 200-124) This invention relates to a mechanical reset apparatus for a switch or other control device and particularly to a reset apparatus providing means to prevent jamming in either the reset position or the operative position so as to bypass the triggering of a switch or control device.

In motor control circuits and the like, overload relay units are often provided to prevent damaging of the motor or other load in the event of abnormal current conditions. For example, heat sensitive solder pot devices have been provided in motor control circuits to open the circuit if the current is excessive for a given time. The solder pot device may include a ratchet wheel which is rotatably carried by a shaft normally fixed against rotation within a solder mas-s. A spring loaded switch mechanism is coupled to the ratchet wheel and normally held closed. A heating element is connected in series with the motor leads and in the presence of an overload current melts the solder to release the ratchet shaft and wheel. When the solder melts, the switch is released and allowed to move to the disconnect position.

The present invention is particularly directed to a small and compact assembly employing a minimum number of parts for actuating and resetting of the switch mechanism with the arrangement being essentially tamper-proof such that the resetting means cannot be locked in position to disable the overload response. The structure is relatively inexpensive, readily maintained and provides reliable operation for long periods of time.

Generally, in accordance with the present invention, the control switch and the heat sensitive trigger means is mounted exteriorly of a control housing such that there is no internal electrical circuitry. The construction is thereby arranged for relatively simple and convenient assembly, maintenance, repair and the like. A pivotally mounted switch actuator is provided within the housing and is resiliently loaded and biased to an actuated position. The actuator is normally held in the spring-loaded condition by the ratchet wheel of a solder pot device or the like. A motion transfer assembly includes a sliding plate coupled to the lever at one end and to a lock and guide member at the opposite end. The lock and guide member is mounted for arcuate motion about a fixed pivot point such that it moves in the direction of the actuator and also perpendicularly with respect thereto. A sliding switch arm is coupled to the guide member to actuate a switch on the exterior wall in response to the perpendicular movement of the lock and guide member. A reset lever assembly includes a pivotally mounted lever arm which moves laterally towards the lock and guide member upon actuation of the lever assembly. If the lock and guide member has been moved laterally as a result of the tripping of the solder pot device, the lever arm engages it and returns the lock and guide member and the sliding plate in the opposite direction. If the solder pot device for holding the pivotal lever is in the locking state, the plate remains in the reset position when the reset lever assembly is released. However, the lock and guide member does not move perpendicularly during the actuation by the lever assembly but is held in the moved position. Therefore, the switch is held actuated until the lever assembly is released and prevents jamming of the switch in the normal protective state.

If the lock and guide member has not been moved as a result of tripping of the trip lever, actuation of the reset lever assembly locates the pivotally mounted member over the lock and guide unit such that subsequent actuation thereof is permitted. The lever assembly cannot be locked in any position to prevent actuation of the switch in the presence of the overload signal.

The drawings furnished herewith illustrate a preferred construction of the present invention in which the above advantages and features are set forth as well as others which will be clear from the following description of the drawings.

In the drawings:

FIG. 1 is a top elevational view of a motor overload relay unit construction in accordance with the present invention;

FIG. 2 is a side elevational view with parts broken away and sectioned to show details of construction with the element in the normal standby position;

FIG. 3 is an exploded view of the unit shown in FIGS. 1 and 2;

FIG. 4 is an elevational view of a switch and operating mechanism shown in FIGS. 13;

FIG. 5 is a side elevational view of FIG. 4;

FIG. 6 is a diagrammatic view showing the unit in the tripped position;

FIG. 7 is a view similar to FIG. 4 showing the resetting mechanism held in an actuated position after a load responsive trip; and

FIG. 8 is a view similar to FIGS. 4 and 5 showing the resetting mechanism held in an actuated position prior to a load responsive trip.

Referring to the drawings and particularly to FIGS. 1 and 2, the illustrated embodiment of the invention is a thermal overload unit for controlling a three phase alternating current motor and the like, not shown, in response to the current flow in three power lines 1 constituting the power lines to the motor. The illustrated overload unit includes three similar current sensitive sections 2, one for each of the three lines 1 which are broken and connected through the corresponding sections. Generally, the overload unit includes an upper housing 3 and a lower housing 4 releasably interconnected with a control switch 5 mounted to one end of the assembled housings 3 and 4. A solder pot assembly 6 is mounted in each of the sections 2 and generally includes a locking ratchet wheel 7 holding a pivotally mounted lever 8 in a standby position. A motion transfer plate 9 is slidably mounted within the housing sections 3 and 4 and is connected at one end to the levers 8 and terminates at the opposite end in a coupling and guide member 10 which is pivotally mounted for movement with plate 9. A switch operator 11 is slidably mounted within the housing 3 and connected to the coupling and guide member 10 and to a switch arm 12 of the adjacent switch 5 for opening and closing thereof in accordance with the positioning of member 10. Once tripped, the device must be manually reset through the use of a reset lever assembly 13 which is shown projecting downwardly through the top of the housing section 3 and coupled to the coupling and guide member 10 for moving of the guide member 10 and the switch operator 11 only in the direction of plate 9. The guide member 10 moves perpendicularly to the plate when assembly 13 is released.

Generally, in the operation of the device, the ratchet wheel 7 holds the lever 8 in a standby position with the coupling member 10 located to maintain the switch 5 in an operative position whereby power flows through the lines 1 to the motor or the like, not shown. It for any reason an abnormal current condition is created, the solder pot assembly 6 responds to the heating effect of the increasing current to release the ratchet wheel 7.

Consequently, the spring loaded levers 8 rotate to the tripped position moving the switch plate 9. The coupling member 10 pivots to reposition the switch operator 11 and actuate the switch of the control circuit. If overload is caused by a temporary condition, the solder pot assembly 6 can reset to again lock the ratchet wheel 7 in place. Actuation and release of the reset lever assembly 13 then returns the several components to their standby position with the lever 8 again locked in the standby condition by engagement with the ratchet wheel 7. The member 10 is however only moved laterally by the assembly 13 and returns to standby under its own bias upon the release of assembly 13. It is therefore impossible to jam the lever assembly 13 to operate independently of the condition of the line current.

More particularly, in the illustrated embodiment of the invention, the housing section 3 is formed of a suitable plastic or other insulating material and includes outer end walls 14 and a pair of intermediate walls 15 defining the three connecting sections 2. Each of the sections 2 is similarly formed and consequently one section is described in detail.

Terminal units 16 and 17 are mounted to the housing 3 in spaced relation within the connecting section 2 and connected to the corresponding line 1. A hat-shaped heating element 18 is secured between the terminals 16 and 17 to serially connect the heating element 18 in circuit with the corresponding line 1. A highly satisfactory heating unit and connection therefor is more fully described in the copending application of Eduard Isler entitled Space Saving Electrical Terminal which was filed on February 11, 1965 with Serial No. 431,796. As in that disclosure, a solder pot assembly 6 is mounted within the connecting section to respond to the current flow through element 18. In the drawing, the assembly 6 is constructed in accordance with the copending application of Walter Landow entitled Solder Pot Switch Control filed on the same date as this application and assigned to the same assignee. As more fully disclosed therein, a U-shaped mounting clip 19 includes the side arms 20 resiliently interlocking with corresponding projections on the adjacent walls 14 and 15 of the housing 3. A solder pot cylinder 21 projects upwardly from the base of clip 19 into the hat-shaped heating element 18. The ratchet wheel 7 is carried within the spring clip 19 by a shaft 22 which projects upwardly into the cylinder 21. The shaft 22 and consequently wheel 7 is normally held in fixed position by solder 23 which fills the cylinder 21. In operation, heating caused by the normal line current is not at a sufficient rate to melt solder 23. Abnormal currents however increase the heat rate of element 18 sufficiently to melt the solder 23, thereby releasing the shaft 22 and the attached ratchet Wheel 7 which permits the pivotal movement of the spring loaded lever 8 which is pivotally mounted within the lower housing section 4.

Generally, the housing section 4 is an L-shaped member which fits between the end walls 14 of housing section 3 beneath the current sensitive sections 2. Housing 4 includes a bottom wall 24 and a back wall 25 which in the assembled relation is aligned with the corresponding back wall 26 of the housing section 3. A clamping and mounting plate 27 is secured spanning the bottom wall 24 and interconnected to the adjacent end walls of the housings 3 and 4 by suitable attachment screws 28. Plate 27 includes an offset mounting ledge 29 for mounting of the device to a suitable support to provide an integrated assembly within which the several components are disposed.

As most clearly shown in FIG. 3, the lever 8 includes a central body portion 30' having a laterally projecting pivot shaft 31. The housing section 4 is provided with a plurality of pivot journals 32 one within each of the several connecting sections 2 for each of the pivot shafts 31. A coil spring 33 encircles the shaft 31 with one end resiliently engaging a ledge 34 on the body portion 30 and the opposite end connected to the housing section 4 as at 35 to continuosly tend to rotate the lever 8 in a counterclockwise direction as viewed in FIG. 2. A ratchet arm 36 projects upwardly from the body portion 30 and includes a laterally bent lip engaging the teeth of the corresponding ratchet wheel 7. The coil spring 33 is stressed to rotate the lever 37 with the arm 36 moving past the wheel 7 to the tripped position if solder 23 melts, as hereinafter described. A coupling projection 37 of lever 8 extends downwardly from the body portion 30 into operating engagement with the switch plate 9 which is slidably mounted within the housings 3 and 4 and defines a stop for the pivotal movement of the lever 8.

Plate 9 generally extends laterally through the lower portion of the assembled housing sections 3 and 4 and is slidably mounted at the opposite longitudinal edges in guide edge slots 38 formed in partial vertical walls 39 of the housing 4. The plate 9 includes an end lever notch 40 aligned with the one outer lever arm 37 and a pair of lever openings 40a aligned one with each of the other lever arms 37. The corresponding springs 33 bias the lever arms 37 into engagement with the corresponding edge openings in the plate 9 and thereby continuously and resiliently urge the plate 9 to move longitudinally to the right in FIG. 2 of the drawings. The outer end of the motion transfer plate 9 adjacent the switch 5 includes a pair of depending legs 41 projecting downwardly from the side edge and an L-shaped upstanding portion projecting upwardly in the opposite direction from the same edge immediately adjacent slot 40. The upstandingportion defines a coupling ledge 42 extending parallel to the principal plane of the plate 9 and outwardly from the corresponding edge. A pair of similar parallel slots 43 and 44 is formed in the coupling ledge 42 extending generally parallel to longitudinal movement of the sliding plate 9 through which it is coupled to the coupling and guide member 10.

The coupling member 10 is a generally U-shaped member having a guide wall 45 aligned with and slidably disposed within the innermost parallel slot 43. The cross sections of guide wall 45 and slot 43 are essentially the same to allow vertical movement of the member 10 with respect to the actuator 10 while preventing relative horizontal movement therebetween. A hook wall 46 projects upwardly through the parallel slot 44 in parallel with the guide wall 45. The leading edge of the hook wall 46 is provided with a hook defining recess 47. A pair of L-shaped walls 48 is integrally formed as lower extensions of walls 45 and 46 and define a narrow guide slot 49 centrally of the walls. A pivot arm 50 is pivotally mounted between the walls 45 and 46 by a pivot shaft 51 and extends downwardly through the guide slot 49. The outer end of arm 50 is chamfered as at 52 with the outermost tip engaging a vertical stop 53 on the edge of the bottom wall 24 and which defines a pivot point for the arm 50, as viewed in FIG. 2. A biasing coil spring 54 is compressed between the underside of the coupling ledge 42 and a ledge 55 on the coupling member 10 and continuously urges the coupling member 10 to a position with the upper ends of the walls 45 and 46 generally in the plane of the upper surface of the coupling ledge 42 as shown in FIG. 2. When plate 9 moves to the right, the coupling member 10 is caused to move to the right also with the arm 50 pivoting about the engagement with the vertical stop 53. The pivotal movement results in the coupling member 10 moving upwardly through the parallel slots 43 and 44 to provide a switch actuating movement, as follows.

The switch operator 11 is a rectangular plastic strip member slidably mounted within the housing section 3 for movement perpendicularly to the longitudinal movement of plate 9. The operator 11 includes a pair of laterally projecting tabs 56 and 57 and define an opening within which an arm 58 of member is slidably mounted. The arm 58 projects in the direction of trip movement from the hook wall 46 immediately below the ledge 42 between tabs 55 and 56. The operator 11 includes an opening 59 within which the switch arm 12 is disposed. The above described pivotal movement of member 10 thus raises the operator 11 to hold the switch 5 in the actuated position.

The switch 5 is preferably constructed in accordance with the switch structure shown in the applicants eopending application entitled Electrical Contactor filed on even date herewith and assigned to a common assignee. However, any other suitable switch may be employed and no further description thereof is included herein.

Once switch 5 has been tripped, the device must be manually reset by operation of lever assembly 13. Generally, the unit 13 includes a plate-like arm 60 slidably mounted within an appropriate opening in the housing section 3 with the lower end terminating adjacent the coupling unit 10. A spring 61 encircles a reduced upper end portion of the arm 60 and acts between a wall on the housing 3 and a portion of the arm 60 to continuously urge the arm outwardly to a standby position. An L- shaped lever 62 is pivotally secured as by a pivot shaft 63 to one side of the lower end of the arm 60. The lever 62 includes an arcuate slot 64 permitting pivotal and lateral movement of the lever 62 with respect to the hook wall 46 of the coupling member 10. A coil spring 65 encircles the shaft 63 and is connected to the lever 62 to continuously pivot it into engagement with the ledge 42. An offset lip 66 on the outer end of the lever 62 is aligned with hook recess 47 and resiliently and slidably rides on the upper surface of the ledge 42, as presently described. When arm 60 is depressed, the lever 62 pivots and also moves laterally toward the hook defined by the recess 47 in wall 46 to move the member 10 and the plate 9 in the direction opposite the trip movement. The operation of the switch mechanism and particularly assembly 13 is clearly shown in the several diagrammatic illustrations of FIGS. 5, 6 and 7.

Referring particularly to FIG. 5, the tripped position is shown in phantom andthe several movements of the coupling member 10 during the tripping from the position of FIG. 2 as a result of release of the solder pot assembly 6 are shown in phantom. Thus, as the plate 9 moves from the left to the right as viewed in FIG. 2 of the drawings, the pivot arm 50 pivots about the stop 53 causing the coupling member 10 to move upwardly and moving the hook recess 47 into alignment with the lip 66 of the reset lever 62.

The resetting action is shown in FIG. 6, with the reset assembly 13 shown in phantom in the depressed position and with the resetting motion shown in phantom.

As the manual reset arm 60 is depressed, the pivotally mounted reset lever 62 moves into engagement with the hook recess 47 The final movement of the arm 69 causes the coupling member It) and consequently the plate to move to the left. The interengagement of the hook recess 47 and the lever 62 holds the member 10 in the raised position. Consequently, arm 58 is also held in the laterally displaced position and switch 5 is maintained in the actuated position.

When the member arm 60 is released, spring 61 rapidly moves the arm upwardly and the lever 62 is disengaged from the hook recess 47, whereupon the spring 54 rapidly causes the member 10 to move laterally. The arm 58 returns to engagement with the pivot stop position.

In FIG. 7, the free trip and tripped position illustrates the action if the arm 60 of assembly 13 is tied down prior to trip. The initial movement of arm 60 causes lever 62 and particularly lip 66 to take the full line position shown in FIG. 7, overlying the top portion of the hook wall 46. Consequently, when the solder pot device 6 is tripped, the plate 9 and the coupling member 10 move upwardly and laterally in the same manner as previously described. The member 10 engages the underside of the lever 62 and as it moves upwardly, pivots the lever 62 from its path. The device can be reset only by releasing the arm to again dispose lip 66 to one side of hook recess 47 and permit the previously described reset action.

The present invention thus provides a nonjamming linkage unit for actuating an exposed switch arrangement for permitting ready maintenance and control of the unit.

Various modes of carrying out the invention are contemplated as being within the scope of the following claims and particularly pointing out and distinctly claiming the subject matter which is regarded as the invention.

I claim:

1. An actuating unit, comprising a motion transfer member movable between a standby position and a tripped position,

a reset member mounted for reset movement between a standby position and a reset position and adapted to be moved laterally thereof,

a control operator, and

a coupling member connected to the transfer member for angular movement from a standby position in response to the movement of the transfer member to the tripped position and rectilinearly movable with said transfer member, said coupling member having a first portion coupled to the control operator to position the operator in accordance with the displacement of the coupling member laterally of the transfer member and a second portion moved into the path of the reset member, said reset member engaging and moving the reset member and transfer member from a tripped position to reset the transfer member while maintaining the control operator in the tripped position,

said second portion of said coupling member being operable to engage and laterally move said reset member from a previously locked-in reset position.

2. The actuating unit of claim 1 wherein said coupling member includes a notched portion aligned with the reset member in the tripped position of the transfer member and said guide means directing the reset member into the notched portion to engage and rectilinearly move the coupling member to reset the transfer member, and means urging the coupling member to an initial position.

3. The actuating unit of claim 1 wherein said coupling member includes a notched portion aligned with the reset member in the tripped position of the transfer member and said reset member being pivotally mounted, guide means directing the reset member into the notched portion to engage and rectilinearly move the coupling member to reset the transfer member, and means urging the coupling member to an initial position.

4. The actuating unit of claim 1 having the transfer member mounted for rectilinear movement, a pivotally attached arm forming a part of said coupling member and extending downwardly therefrom,

a base upon which the lower end of the arm rests and having a stop engaged by the arm in the standby position whereby rectilinear movement of the transfer member pivots the coupling member about the lower end of the arm and moves the coupling member transversely of the transfer member and into the path of the reset member.

5. The actuating unit of claim 1 having a resiliently loaded actuator coupled to the reset member.

6. An actuating and reset assembly comprising,

a rectilinearly movable transfer member movable to a tripped position,

a coupling member coupled to the movable member and including means to permit perpendicular movement of the coupling member to a tripped position relative to the movement of the transfer member to the tripped position,

support means for the coupling member and conload responsive means coupled to move the plate from the standby position to the tripped position, reset lever movable between a standby position and a reset position,

an operator,

coupling member pivotally mounted adjacent the plate and having a control member slidably secured to the plate for longitudinal movement and lateral displacement and said coupling member having a member coupled to the operator to position the operator in accordance with the lateral displacement of the control member, and the lateral displacement of the control member being disposed in the path of the reset lever in moving between the standby and tripped positions, said control member engaging and independently moving the reset lever in moving to a tripped position with the reset lever held in the reset position,

said reset lever engaging the control member and longitudinally resetting the coupling member and the transfer plate from the tripped position, and

means to laterally reset the coupling member upon remeans biasing the lever to a given limit,

sliding actuator coupled to the lever and having corresponding standby and tripped positions,

reset lever unit having a standby position and a reset position and having a reset lever movably attached as a part of the lever unit,

switch operator, and

coupling member pivotally mounted adjacent the actuator and having a first portion coupled to the switch operator to position the switch operator in accordance with the actuator and a second portion releasably coupled to the reset lever with the sliding actuator in the tripped position, said member engaging the reset lever in moving to a tripped position with the reset lever held in the reset position and independently moving the reset lever.

A switch actuating unit, comprising pivotally mounted lever having a standby position and a tripped position,

sliding actuator slidably mounted with one end of the lever secured thereto and positioned between a standby position and a tripped position by said lever, coupling member coupled to the actuator for longitudinal movement therewith and for independent lateral movement,

means secured to the coupling member to cause lateral a switch operator coupled to the coupling member for positioning in accordance with the lateral movement of the coupling member, and

a switch having a movable contact member connected to the switch operator.

10. A switch actuating unit, comprising pivotally mounted lever having a standby position and a tripped position,

sliding actuator having a slot adjacent one end and slidably mounted with one end of the lever disposed within the slot and having a pair of parallel slots in spaced relation to the first named slot, said actuator being positioned by pivotal movement of said lever,

a coupling member having a pair of parallel arms slidably disposed within the parallel slots and having a standby position, one of said arms corresponding to the mating slot to form a guide for the coupling member and the second of said arms having a recess defining a hook, said coupling member further including a third arm projecting normal to the first two arms,

a pivot arm pivotally secured to the coupling member and projecting angularly therefrom in the direction of the trip movement of the sliding actuator,

a stop disposed in engagement with the pivot arm preventing translation of the pivot arm during trip movement of the actuator and permitting pivotal movement whereby said coupling member moves longitudinally and laterally of the sliding actuator in response to trip movement of the actuator,

reset unit slidably mounted adjacent the end of the actuator and having a pivotally mounted reset lever aligned with said hook and biased into sliding engagement with the actuator whereby reset movement of the reset unit causes the end of said reset arm to move into engagement with the hook and move the actuator and the coupling member to the standby position, said lever moving over the coupling member in response to reset movement of the reset unit with the coupling member in the standby position,

switch operator having anopening receiving the third arm of the coupling member for corresponding positioning, and

switch having a movable contact member connected to the switch operator.

terminals for connection by said solder pot unit, control switch releasably mounted to one side of the housing with the terminals accessible from the exterior of the housing and having a switch arm,

a spring loaded lever pivotally mounted in the housing and having a standby position with one end for holding engagement with said ratchet member and a tripped position responsive to the release of the ratchet member,

sliding plate having a slot and slidably mounted within the housing with one end of the lever disposed within the slot, said plate including an L-shaped edge extension defining an offset parallel ledge having a pair of parallel slots, said actuator being positioned by pivotal movement of said lever,

coupling member having a pair of parallel arms slidably disposed within the parallel slots, one of said arms corresponding to the slot to form a guide for the coupling member and the second of said arms having a recess defining a hook opening in the direction of reset movement of the plate, said coupling member further including a third arm projecting normal to the first two arms in the direction of reset movement of the plate and located below the ledge,

a pivot arm pivotally secured to the coupling member below the ledge and projecting angularly therefrom in the direction of movement of the sliding plate,

a switch operator coupled to said switch arms and having an opening slidably receiving the third arm of the coupling member for corresponding posia stop wall in the housing located in engagement with the end of the pivot arm to prevent translation of the pivot arm in the direction of reset movement and permitting pivotal movement,

a reset arm slidably mounted adjacent the end of the tioning.

References Cited by the Examiner UNITED STATES PATENTS 11) plate for motion perpendicular to the plate and havfi gf ing a pivotally mounted reset lever secured to the at 135 2,803,722 8/1957 Kuhn 200124 lower end, spring means blasing the outer end of 3 23 803 12/1965 W I 200 124 the lever biased into sliding engagement with the aters ledge whereby inward movement of the reset arm 15 causes the end of said rese-t lever to move toward the parallel slots and into engagement with the hook of a tripped coupling member to move the plate and H. B. GILSON, Assistant Examiner.

BERNARD A. GILHEANY, Primary Examiner. 

1. AN ACTUATING UNIT, COMPRISING A MOTION TRANSFER MEMBER MOVABLE BETWEEN A STANDBY POSITION AND A TRIPPED POSITION, A RESET MEMBER MOUNTED FOR RESET MOVEMENT BETWEEN A STANDBY POSITION AND A RESET POSITION AND ADAPTED TO BE MOVED LATERALLY THEREOF, A CONTROL OPERATOR, AND A COUPLING MEMBER CONNECTED TO THE TRANSFER MEMBER FOR ANGULAR MOVEMENT FROM A STANDBY POSITION IN RESPONSE TO THE MOVEMENT OF THE TRANSFER MEMBER TO THE TRIPPED POSITION AND RECTILINEARLY MOVABLE WITH SAID TRANSFER MEMBER, SAID COUPLING MEMBER HAVING A FIRST PORTION COUPLED TO THE CONTROL OPERATOR TO POSITION THE OPERATOR IN ACCORDANCE WITH THE DISPLACEMENT OF THE COUPLING MEMBER LATERALLY OF THE TRANSFER MEMBER AND A SECOND PORTION MOVED INTO THE PATH OF THE RESET MEMBER, SAID RESET MEMBER ENGAGING AND MOVING THE RESET MEMBER AND TRANSFER MEMBER FROM A TRIPPED POSITION TO RESET THE TRANSFER MEMBER WHILE MAINTAINING THE CONTROL OPERATOR IN THE TRIPPED POSITION, SAID SECOND PORTION OF SAID COUPLING MEMBER BEING OPERABLE TO ENGAGE AND LATERALLY MOVE SAID RESET MEMBER FROM A PREVIOUSLY LOCKED-IN RESET POSITION. 